Descri'ption of Orii/inatocarcl nn-s corioensis. 357 



The cardiac area is triangular and slightly tiunid. It is 

 bounded anteriorly by a well-marked ridge, convex in front, 

 situated about one-third of the length of the carapace from the 

 posterior margin. The sides of the carapace are nearly vertical 

 except in the posterior two-thirds ; where viewed from above 

 there is an outward steeply sloping area. This meets an acute 

 ridge, which is parallel to the fore and aft curvature of the 

 dorsal surface. 



Anterior edge of the carapace finely and regularly t:ranulate 

 from the distal end of the spine to the orbit. Surface finely 

 granulate in the hepatic region, the granules being coarsest in 

 the antero-lateral angle, and becoming finer as they recede from 

 that point. Outer third of the transverse ridge CTanulate. The 

 postero-lateral margin with coarse irregular granules along its 

 upper edge. Remainder of the carapace smooth. 



Chelipedes nearly twice as long as the length of the transverse 

 ridge of the carapace. Ai-m trigonal, its lower edge granular on 

 its proximal half, with three small, acute, equi-distant spines on 

 its distal half. 



Wrist with a prominent spine on its inner side, a smaller 

 one at the outer distal angle. 



Hand flattened, widest at the base of the finger, where its 

 width is about equal to three-quarters of the length, of the 

 mobile finger. A broad, shallow groove along its posterior third 

 marks off a flattened ridge along the inner edge, which is finely 

 granular. The upper edge is similarly granular. 



Fingers much compressed, with small irregular teeth; a 

 slightly larger one about the middle of the free finger fitting 

 between two similar ones on the immobile finger. 



The mera of the ambulatory limbs are expanded, those of the 

 posterior ones specially so, the breadth being more than twice 

 the thickness. 



Eye stalks very long. 



Measurements. 

 1. Specimen from Curlewis (Rev. A. W. Cresswell) — Fig 1. 

 Length, from hind edge of orbit to pos- 

 terior margin - - - - - 26 mm. 

 Breadth, just behind antero-lateral spines 45 ,, 

 Posterior margin - - - - - 32 ,, 



